J/MNRAS/413/2689ivo://CDS.VizieR/J/MNRAS/413/2689doi:10.26093/cds/vizier.74132689CDSKun M.Szegedi-Elek E.Moor A.Kospal A.Abraham P.Apai D.,Kiss Z.T.Klagyivik P.Magakian T.Yu.Mezo Gy.Movsessian T.A.Pal A.,Racz M.Rogers J.2024-07-13T20:15:19Z2012-01-23T10:54:45ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frpre-main-sequence-starsinfrared-photometryvisible-astronomyphotometryYoung Sun-like stars at the beginning of the pre-main-sequence (PMS) evolution are surrounded by accretion discs and remnant protostellar envelopes. Photometric and spectroscopic variations of these stars are driven by interactions of the star with the disc. Time-scales and wavelength dependence of the variability carry information on the physical mechanisms behind these interactions. We conducted multi-epoch, multiwavelength study of PV Cep, a strongly variable, accreting PMS star. By combining our own observations from 2004 to 2010 with archival and literature data, we show that PV Cep started a spectacular fading in 2005, reaching an IC-band amplitude of 4mag. Analysis of variation of the optical and infrared fluxes, colour indices and emission line fluxes suggests that the photometric decline in 2005-2009 resulted from an interplay between variable accretion and circumstellar extinction: since the central luminosity of the system is dominated by accretion, a modest drop in the accretion rate could induce the drastic restructuring of the inner disc. Dust condensation in the inner disc region might have resulted in the enhancement of the circumstellar extinction.2011MNRAS.413.2689Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/413/2689CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/413/2689https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/413/2689http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/413/2689https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/413/2689https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/413/2689http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/413/2689GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/413/2689/table1 (Comparison stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/413/2689/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/413/2689/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/413/2689/table1?GETtext/xml+votable180.050000true311.62037567.98483330.0055555555555555566/159652.4016587514425055e-21 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/413/2689?format=asciiOpticalInfrareddefaultJ/MNRAS/413/2689/table1Comparison starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintC[1-16] Comparison star numbermeta.id;meta.mainintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagJohnson V magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatRcmagCousins R magnitudemagphot.mag;em.opt.Rfloate_Rcmagrms uncertainty on Rcmagmagstat.error;phot.mag;em.opt.RfloatIcmagCousins I magnitudemagphot.mag;em.opt.Ifloate_Icmagrms uncertainty on Icmagmagstat.error;phot.mag;em.opt.IfloatJ/MNRAS/413/2689/table2Results of the photometry of PV CepJDJulian datedtime.epochintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation datetime.epoch;obsnullableVmag? Johnson V magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? rms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatnullableRcmag? Cousins R magnitudemagphot.mag;em.opt.Rfloatnullablee_Rcmag? rms uncertainty on Rcmagmagstat.error;phot.mag;em.opt.RfloatnullableIcmag? Cousins I magnitudemagphot.mag;em.opt.Ifloatnullablee_Icmag? rms uncertainty on Vmagmagstat.error;phot.mag;em.opt.IfloatnullableTelTelescopemeta.id;instr.telcharJ/MNRAS/413/2689/table4Spitzer photometry for PV CeprecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateObservation datetime.epoch;obsnullableF3.6? Color-corrected Spitzer/IRAC flux at 3.6umJyphot.mag;em.IR.3-4umfloatnullablee_F3.6? rms uncertainty on F3.6umJystat.errorfloatnullableF4.5? Color-corrected Spitzer/IRAC flux at 4.5umJyphot.mag;em.IR.4-8umfloatnullablee_F4.5? rms uncertainty on F4.5umJystat.errorfloatnullableF5.8? Color-corrected Spitzer/IRAC flux at 5.7umJyphot.flux.density;em.IR.4-8umfloatnullablee_F5.8? rms uncertainty on F5.7umJystat.errorfloatnullableF8.0? Color-corrected Spitzer/IRAC flux at 8.0umJyphot.flux.density;em.IR.8-15umfloatnullablee_F8.0? rms uncertainty on F8.0umJystat.errorfloatnullableF24? Color-corrected Spitzer/MIPS flux at 24umJyphot.flux.density;em.IR.15-30umfloatnullablee_F24? rms uncertainty on F24umJystat.errorfloatnullableF70? Color-corrected Spitzer/MIPS flux at 70umJyphot.flux.density;em.IR.30-60umfloatnullablee_F70? rms uncertainty on F70umJystat.errorfloatnullable